My brother is married behind my sister's back, and my sister's family can remind her that my sister won't be bullied if my brother is in charge and I have a backer.
When a girl gets married, it means leaving one family to live in another, so getting married is called a "big event", which is very grand. Since ancient times, there has been a saying that "my sister goes out to the back of the boudoir, and my sister goes back to her mother's house to pick her up."